Slippery thermals and the cumulus entrainment paradox

Journal of the Atmospheric Sciences

Volumn 70, Issue 8, 2013, Pages 2426-2442

  Sherwood, Steven C ^a   Hernández Deckers, Daniel ^a   Colin, Maxime ^a   Robinson, Francis ^b  

^a UNIVERSITY OF NEW SOUTH WALES   (Australia)

^b YALE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BUDGET CONTROL; CLOUDS; FRICTION; VORTEX FLOW;

AIR PARCELS; CONCEPTUAL MODEL; DILUTION RATE; ENTRAINMENT RATES; MOMENTUM BUDGET; THERMAL; TOROIDAL VORTICES; UPWARD VELOCITIES; VORTEX PAIR; VORTEX RINGS;

MOMENTUM;

BUOYANCY; CLOUD COVER; COMPUTER SIMULATION; CONCEPTUAL FRAMEWORK; CUMULUS; ENTRAINMENT; HUMIDITY; MIXING; OCEANIC CIRCULATION; TROPOSPHERE;

EID: 84882637472     PISSN: 00224928     EISSN: 15200469     Source Type: Journal    
DOI: 10.1175/jas-d-12-0220.1     Document Type: Article

References (59)

1. Batchelor, G. K., 1967: An Introduction to Fluid Mechanics. Cambridge University Press, 615 pp.
2. Betts, A. K., 1982: Saturation point analysis of moist convective overturning. J. Atmos. Sci., 39, 1484-1505.
3. Blyth, A. M., W. A. Cooper, and J. B. Jensen, 1988: A study of the source of entrained air in Montana cumuli. J. Atmos. Sci., 45, 3944-3964.
4. Blyth, A. M., W. A. Cooper, and J. B. Jensen, S. G. Lasher-Trapp, and W. A. Cooper, 2005: A study of thermals in cumulus clouds. Quart. J. Roy. Meteor. Soc., 131, 1171-1190.
5. Carpenter, R. L., K. K. Droegemeier, and A. M. Blyth, 1998: Entrainment and detrainment in numerically simulated cumulus congestus clouds. Part III: Parcel analysis. J. Atmos. Sci., 55, 3440-3455.
6. Chae, J. H., and S. C. Sherwood, 2010: Insights into cloud-top height and dynamics from the seasonal cycle of cloud-top heights observed by MISR in the west Pacific region. J. Atmos. Sci., 67, 248-261.
7. Chepfer, H., S. Bony, D. Winker, M. Chiriaco, J. L. Dufresne, and G. Seze, 2008: Use of CALIPSOlidar observations to evaluate the cloudiness simulated by a climate model. Geophys. Res. Lett., 35, L15704, doi:10.1029/2008GL034207.
8. Chikira, M., and M. Sugiyama, 2010: A cumulus parameterization with state-dependent entrainment rate. Part I: Description and sensitivity to temperature and humidity profiles. J. Atmos. Sci., 67, 2171-2193.
9. Dabiri, J. O., and M. Gharib, 2004: Fluid entrainment by isolated vortex rings. J. Fluid Mech., 511, 311-331.
10. Damiani, R., G. Vali, and S. Haimov, 2006: The structure of thermals in cumulus from airborne dual-Doppler radar observations. J. Atmos. Sci., 63, 1432-1450.
11. Dawe, J. T., and P. H. Austin, 2011: The influence of the cloud shell on tracer budget measurements of les cloud entrainment. J. Atmos. Sci., 68, 2909-2920.
12. Del Genio, A. D., 2012: Representing the sensitivity of convective cloud systems to tropospheric humidity in general circulation models. Surv. Geophys., 33, 637-656, doi:10.1007/s10712-011-9148-9.
13. Del Genio, A. D., and J. B. Wu, 2010: The role of entrainment in the diurnal cycle of continental convection. J. Climate, 23, 2722-2738.
14. Derbyshire, S. H., I. Beau, P. Bechtold, J.-Y. Grandpeix, J.-M. Pirou, J.-L. Redelsperger, and P. Soares, 2004: Sensitivity of moist convection to environmental humidity. Quart. J. Roy. Meteor. Soc., 130, 3055-3079.
15. de Roode, S. R., and C. S. Bretherton, 2003: Mass-flux budgets of shallow cumulus clouds. J. Atmos. Sci., 60, 137-151.
16. de Roode, S. R., and C. S. Bretherton, A. P. Siebesma, H. J. J. Jonker, and Y. de Voogd, 2012: Parameterization of the vertical velocity equation for shallow cumulus clouds. Mon. Wea. Rev., 140, 2424-2436.
17. Emanuel, K. A., 1991: A scheme for representing cumulus convection in large-scale models. J. Atmos. Sci., 48, 2313-2335.
18. Fierro,A.O., J. Simpson, M. A. LeMone, J.M. Straka, andB. F. Smull, 2009: On how hot towers fuel the Hadley cell: An observational andmodeling study of line-organized convection in the equatorial trough from TOGA COARE. J. Atmos. Sci., 66, 2730-2746.
19. Fridlind, A. M., and Coauthors, 2004: Evidence for the predominance of mid-tropospheric aerosols as subtropical anvil cloud nuclei. Science, 304, 718-722.
20. Heus, T., and H. J. J. Jonker, 2008: Subsiding shells around shallow cumulus clouds. J. Atmos. Sci., 65, 1003-1018.
21. Heus, T., and H. J. J. Jonker,, G. Van Dijk, H. J. J. Jonker, and H. E. A. Van den Akker, 2008: Mixing in shallow cumulus clouds studied by Lagrangian particle tracking. J. Atmos. Sci., 65, 2581-2597.
22. Hill, M. J. M., 1894: On a spherical vortex. Philos. Trans. Roy. Soc., 185, 213-245.
23. Holloway, C. E., and J. D. Neelin, 2009: Moisture vertical structure, column water vapor, and tropical deep convection. J. Atmos. Sci., 66, 1665-1683.
24. John, V. O., and B. J. Soden, 2006: Does convectively-detrained cloud ice enhance water vapor feedback. Geophys. Res. Lett., 33, L20701, doi:10.1029/2006GL027260.
25. Keenan, T. D., and R. E. Carbone, 1992: A preliminary morphology of precipitation systems in tropical northern Australia. Quart. J. Roy. Meteor. Soc., 118, 283-326.
26. Khairoutdinov, M., and D. Randall, 2006: High-resolution simulation of shallow-to-deep convection transition over land. J. Atmos. Sci., 63, 3421-3436.
27. Malkus, J. S., 1954: Some results of a trade cumulus cloud investigation. J. Meteor., 11, 220-237.
28. Malkus, J. S., R. S. Scorer, F. H. Ludlam, and O. Björgum, 1953: Bubble theory of penetrative convection. Quart. J. Roy. Meteor. Soc., 79, 288-293.
29. Mapes, B. E., and R. B. Neale, 2011: Parameterizing convective organization to escape the entrainment dilemma. J. Adv. Model. Earth Sys., 3, M06004, 10.1029/2011MS000042.
30. Morton, B. R., G. Taylor, and J. S. Turner, 1956: Turbulent gravitational convection from maintained and instantaneous sources. Proc. Roy. Soc. London, 234A, 1-23.
31. Narasimha, R., S. S. Diwan, S. Duvvuri, K. R. Sreenivas, and G. S. Bhat, 2011: Laboratory simulations show diabatic heating drives cumulus-cloud evolution and entrainment. Proc. Natl. Acad. Sci. USA, 108, 16 164-16 169.
32. Paluch, I. R., and D. G. Baumgardner, 1989: Entrainment and finescale mixing in a continental convective cloud. J. Atmos. Sci., 46, 261-278.
33. Riehl, H., and J. S. Malkus, 1958: On the heat balance in the equatorial trough zone. Geophysica, 6, 503-537.
34. Robinson, F. J., S. C. Sherwood, D. Gerstle, C. Liu, and D. J. Kirshbaum, 2011: Exploring the land-ocean contrast in convective vigor using islands. J. Atmos. Sci., 68, 602-618.
35. Romps, D. M., 2010: A direct measure of entrainment. J. Atmos. Sci., 67, 1908-1927.
36. Z. M. Kuang, 2010: Do undiluted convective plumes exist in the upper tropical troposphere? J. Atmos. Sci., 67, 468-484.
37. Sahany, S., J. D. Neelin, K. Hales, and R. B. Neale, 2012: Temperature moisture dependence of the deep convective transition as a constraint on entrainment in climate models. J. Atmos. Sci., 69, 1340-1358.
38. Sanchez, O., D. J. Raymond, L. Libersky, and A. G. Petschek, 1989: The development of thermals from rest. J. Atmos. Sci., 46, 2280-2292.
39. Saunders, P.M., 1961: An observational study of cumulus. J. Meteor., 18, 451-467.
40. Schumann, U., and C. H. Moeng, 1991: Plume budgets in clear and cloudy convective boundary layers. J. Atmos. Sci., 48, 1758-1770.
41. Scorer, R. S., and F. H. Ludlam, 1953: Bubble theory of penetrative convection. Quart. J. Roy. Meteor. Soc., 79, 94-103.
42. C. Ronne, 1956: Experiments with convection bubbles. Weather, 11, 151-155.
43. Sherwood, S. C., P. Minnis, and M. McGill, 2004: Deep convective cloud top heights and their thermodynamic control during CRYSTAL-FACE. J.Geophys. Res., 109, D20119, doi:10.1029/2004JD004811.
44. R. Roca, T. M. Weckwerth, and N. G. Andronova, 2010: Tropospheric water vapor, convection, and climate. Rev. Geophys., 48, RG2001, doi:10.1029/2009RG000301.
45. Siebesma, A. P., and J. W. M. Cuijpers, 1995: Evaluation of parametric assumptions for shallow cumulus convection. J. Atmos. Sci., 52, 650-666.
46. Simpson, J., 1983: Cumulus clouds: Numerical models, observations, and entrainment. Mesoscale Meteorology, D. K. Lilly and T. Gal-Chen, Eds., D. Reidel, 413-445.
47. Sinkevich, A. A., and R. P. Lawson, 2005: A survey of temperature measurements in convective clouds. J. Appl. Meteor., 44, 1133-1145.
48. Stommel, H., 1947: Entrainment of air into a cumulus cloud. J. Meteor., 4, 91-94.
49. Turner, J. S., 1957: Buoyant vortex rings. Proc. Roy. Soc. London, 239A, 61-75.
50. Turner, J. S., 1964: The flow into an expanding spherical vortex. J. Fluid Mech., 18, 195-208.
51. Turner, J. S., 1972: Energy deficiency in self-preserving convective flows. J. Fluid Mech., 53, 217-226.
52. Turner, J. S., 1973: Buoyancy Effects in Fluids. Cambridge University Press, 367 pp.
53. Warner, J., 1970: On steady-state one-dimensional models of cumulus convection. J. Atmos. Sci., 27, 1035-1040.
54. Weckwerth, T., and D. B. Parsons, 2006: A review of convection initiation and motivation for IHOP_2002. Mon. Wea. Rev., 134, 5-22.
55. Winker, D. M., and Coauthors, 2010: The CALIPSO Mission: A global 3D view of aerosols and clouds. Bull. Amer. Meteor. Soc., 91, 1211-1229.
56. Xu, K. M., and D. A. Randall, 2001: Updraft and downdraft statistics of simulated tropical and midlatitude cumulus convection. J. Atmos. Sci., 58, 1630-1649.
57. Zhang, Y., S. A. Klein, J. Boyle, and G. G. Mace, 2010: Evaluation of tropical cloud and precipitation statistics of Community Atmosphere Model version 3 using CloudSat and CALIPSO data. J.Geophys.Res., 115, D12205, doi:10.1029/2009JD012006.
58. Zhao, M., and P. H. Austin, 2005: Life cycle of numerically simulated shallow cumulus clouds. Part II: Mixing dynamics. J. Atmos. Sci., 62, 1291-1310.
59. Zhou, L., R. B. Neale, M. Jochum, and R. Murtugudde, 2012: Improved Madden-Julian oscillations with improved physics: The impact of modified convection parameterizations. J. Climate, 25, 1116-1136.